How to do multiple materials for blender object

gaumaugher

I am sure this is simple but I cannot find any reference to it in the forums. I want to make an object in blender, say a table, and be able to select from multiple materials, like natural oak, or a dark walnut when I pull it in to a scene. I see it done all the time but I can't find any instructions on how to accomplish it. A little help would be appreciated.

I should note here that the creating and importing is working great. I just want to be able to have more than one choice for the texture.